It is your responsibility to that child to do everything in your power, and if it's beyond your power go beyond your power, to bring justice upon that company, and the driver too. Every dollar you make them lose will bring dignity to your child. Don't think about the money you'll get in the process, I would spend exactly all of it on a beautiful, lavish, luxurious funeral and give to the orphanages. In fact maybe find a kid just like him and adopt him.

The company will pretend to have lawyers on retainer so it costs them nothing, or that they have insurance, anything to pretend you can never bring them lower for their mortals sins. But those jury trials set precedent, their lawyers run out of arguments, their victim's parents meet in person, the media's plaintiff slander falls flat. Retainer is just an advance every month, their lawyers flat out will not slave away any longer than a clock keeps silent. Insurance for this stuff actually makes it about three times as expensive, it mostly functions as a word to say "we're insured" like "you can't get me" to the plaintiff and "we're not going out of business" to themselves. They are a revenue-based business, they don't actually plant a seed and reap two, meaning make a profit, they rather make ten dollars in revenue than one dollar in profit, so their margins are razor thin. And that's why they're a shitty business that murders children, they don't care about fighting entropy, they only pass it on to others, like your son. Their revenues are predicated on cutting corners, less negligence means less money, they want more money, more negligence. They made money off your son. They have to pay settlements out of profits, no tax breaks, raw. It's not a question of whether your lawsuit will singlehandedly ruin them (and it actually could), rather that you will not fight them alone. If you sue, likely ten others will sue as well. And the American justice system even today just can't shit on the murder of an infant, it hasn't gotten to that point. In general the justice system works, it's just too highly suspicious of hacks and in some cases it has been sabotaged because justice would mean justice, the people making the laws are not sure they want justice if it means justice.

The reason they killed him is because they thought you wouldn't retaliate. They predicted they could get a bunch of prostitutes to tell you "suing them won't bring your son back" and "the litigation will be painful" (on the contrary, it will feel like morphine, you'll have a great time as long as you forfeit the money). Your wimping out now justifies their infanticide. You can't let them predict the future like that.

Fighting them will bring your son back. The justice system is designed to put lost causes, martyrdom, righteousness, above everything else. The litigation is only painful if you let them dangle bribes in front of you, and like they'll try to tell you a really big number at some point, to try to get you to bite and talk to yourself differently, then niggle you down from there. Negotiate, that kind of shit. Make a contract with the court that every last cent of your wins will go to his funeral, and that you are under no obligation to negotiate, you want to complete the trial without aborting it, because a settlement would amount to aborting this trial, aborting justice.